costello



CSTELL AUNG FURNACR APPLIGAHGN mm3 )um 9. 1920.

rol 1ers raoul-as J, oosTELLo, or reUuBULL-onio, Assignee To GEORGE J. Hasen ooifi..

sans', es masseuses, PsnNsrLvAum, e. oosrosATIoig or rsNNs'i/"LVMIIA NNEALING-FURNACE Specification of Reissued Letters Patent. Reisgugd 1)@3 215 jgge Original No. 1,338,681, dated April 13, 1920, Serial No. 139,527, ied December 29, 1916. Application for reissue filed ,Tune 9, 1920. Serial No. 387,762. l

` lowing is a specification.

This invention reiates to improvements in furnaces used for annealing metals. in which iong pu s, as for instance steei plates. are

`inserted in one end and 'liseharged at the other endg with the mechanical assistance of eurfing roilers; and the objects of my iiwei ion are, lirst7 to greatly econoinize the opereting` cost hy providing' means for easily, quickly and cheaply rene/wing said when requisite so to do: second. to

reduce rollers in Contact. 'with the heat o'i the interior ot said furnaces and their annealing contents; and, third, to provide means for utilizing said rollers for equaliziugi the temperatures in opposite ends and throughout said furnaces. i

l :attain these ohjeet by the mechanism illustrated in the'aeconipaufing dramirigs in Whioh.- Figure i is n View of the interior of my furnace taken lengthwise, partly in section and broken away at the rear end. Fig. 2 is a View partly in seetimi` taken through lthe line ,A-A of Fig. l; Fig. is a side eievation or a 'roiler and 'fi-fig. an. edge elevation ot the saine.

Fig. u` 1view of a@ hoiiowV roller in sec tion tairen through the center of its hub;

(3 and Fie. 7 are sectional views on` planes indicated by the 'lines VIL- V1 and \/"II--'Vli,' Fig.

Similar characters refer to like perfs throughout the several views.

A. furnace is inelosed by side Walls 1, l; an arehed root 2, end Weils 3.:11id a bottom 2l, on a' hase 4; all of refractory material..

Charging oiieuings lei for the reception of the pistes or other artioies to he annealed are formed in the front end of the furnace The charging openings are provided With suitable doors (not shown) as is the usual practice and suitable provision is made for heating the chamber.l the tire box it'or suoli purpose being located adjacent. to the front end oi the furnace as is the usual practice.v

to u. minimum the portions oi. said4 A series of channels are formed at risrht angles to the direction of movement of aiiticles through the -furnace, in the hed or' hearth of the furnace and `Within these channels are arranged shafts 9 Whieh are, mounted in hearings 15, suitably supported the side Walls of the furnace, a series of suiitahiy spaced rollers 7 are carried by. each of these,y shafts, the shafts being supported lov their bearings so that 0111;y a small portion-doi the rollers will project abou-e the hearth of the furnace, as clearly shown in Figs, 1 and 2. These shafts are rotated by any suitable lmeans, o. hy sprocket chains passing.

through having 'their inlets and outlets 'formed 'hy the hubs 8 vudiich yare made hoi` low and are internally threaded'tor the re eeption of short pipe sections forming 'the shafts for the rollers. The end sections of the shafts are connected respeetively preferahiy through packing hores to Water supply pipes l@ and Voutlet pipes-18', shown in Fig. 2.

'The channels extend" through the side Waiis of the furnace and are inade of 'trans'- verse dimensions so as to permit of the ro'il ers v'being lowered thereunto and shifted aiong so as to permit renewal' of the' roliers when necessary. "While the ports 26 at 'the ends of the ohanneis will be normally closed hy hrielr work or in any other suitable manner so as to prevent the inflow of air7 it is preferred to also place removal blocks 25 in the channels as shown in Figs. l and 2. The channels intermediate the rollers are covered by arc-,hes 24 which serve to protect the shafts 9 fromr excessive heatinn. i

'As to the rollers, Figs. 3 to 7, the stream of cold water iiowing in from pipe 18 and out through pipe 18 (Fig. 2) enters each of thehuhs 8, 87 through the shafts 9, 9, untii The extreme heat of the front or charging,

end of the furnace tends to overheat the rollers 7, 7 at the end and to raise the temperature of the front end of the furnace and the series of rollers nearest 'to it to a higher degree than that of the exit end and the rear rollers.

It is essential that the entire furnace should Ybe kept at as nearly a uniform temperature aspossible to produce a uniform temper in the annealed ,metal Wherefore, while I am aware it isnot new to restrain the temperature of rolls by flowing water through their centers or axles; and also that water circulating interiorly of rapidly driven fly wheels of speed motors and the like in chambers near their peripheries has been employed, I do not claim either of these methods or uses as novel in my vinventionv per se, since as the use of shafts, disks or furnace chambers are not new per se; what I do claim for them as novel in their adaptation-for use in my improved furnace will be clearly differentiated vand set forth specifically in my claims relative thereto, as hereinafter written.

With that in view attention iscalled to the fact that I prefer to use my improved hollow rollers as shown in Figs. 3 and 4 only at the front or charging end of my furnace adjacent to the entrance port 14, leaving the corresponding series of rollers near the exit or rear end of the furnace as being of solid disk construction with water pas` sages through their respective hubs only.

ly said invention in 'that regard results in a most important improvement in the art of annealing said large plates in large furnaces; which would not be material insmall furnaces as now used where the interior is easily maintained at a practically uniform temperature,4 in that the rear rollers soon become much hotter than the forward rollers and help raise the coolingrear-ends of the plates and the back of the furnace to a. temperature more nearly uniform withdthat of the entrance end; in that way making a t annealing of said'large plates alone sble.

prp.. l l

ln present practice whenv corresponding'l rolls or rollers have been superheated so as to have deteriorated, 1t is necessary to shut ce; tear its base apart and l. f rolls or-rollers at very great "me and money,

',l`hm'cf`lmg l have provided thtl block beds,

25, 25, as illustrated, and in practice, when renovation is needed, the outer ends of ports 26, 26, are opened; thc successive block beds 25,25, are pulled out therethrough in series; the shafts 9, 9, and with them Ythe rollers 7, 7, arefdro-pped down in the' chambers 23, 23, to where said block beds were, and the rollers 7, 7, themselves are pulled out through said ports 26,26, and new ones subn stituted for them on the shaft membersQ, 9;

and the whole quickly reassembled for immediate use.

I haveillustrated and described my invention andimprovements with such clearness thatany one skilled in the art of fur nace construction can build furnaces in conformity therewith and with modifications Yof the direct flow of heat and to a large extent protected by 4the hearth.l In order to prevent injury to the hearth, when it'be. comesnecessary to renew the feed disks, pro-` vision is made for shifting the shaft laterallyvto move they disks out of the plane'4 of the hearth and into alinement with an opening in a wall of the furnace, through which the shaft carrying the disks can be moved longitudinally.

I claim:

l. The combination of an annealing furnace of the kind described and having an v entrance port at the firing and charging end and an exit port at the opposite end; and rollers in a plurality of latitudinal series located at its bottom on revoluble shafts below the line of said bottom a distance but Slightly less than the radii vof said rollers; vwith chambers below said bottom opening at their tops thereinto and receiving said rollers; arches adjacent to the sides of said rollers surmounting the lateral walls-of said chambers and protruding slightly into said furnace but less than do said rollers; bed blocks fitting into the bottoms of said chambers under said rollers, their hubs and portions of their sustaining shafts; and ports at the sides of said furnace, in line horizontally with said bed blocks, positioned and of capacity for the withdrawal of said bed blocks, rollers and shafts'therethrough for the purpose set forth.

2. In a furnace of the kind described, having rollers mounted in latitudinal series on shafts below the bottom of said furnace and rotating in chambers in its base, bed blocks under said rollers substantially filling the insu.

portions of said chambersvnot occupied by :said rollers, and lateral portsin line with the shafts of said rollers for the removal thereof therethrough vrfor the purpose set forth. f'

3. In a furnace of the kind described, rollers positioned in series in'a base at the bottom thereof andr protruding a fraction of the length of their radii thereinto; lateral ports in the walls of `"-id furnace in horizontal line With said series of rollers respec tively and rmeans for withdrawing said rollers through said ports as shown and defscribed. I

Il. An annealing furnace having a hearth provided with transverse openings and With charging and discharging openings at its respective ends in combination with means for moving articles tlirougli the furnace consisting of a series of shaftsrarranged transversely of the furnace and below the openings in the hearth and each shaft carrying a plurality of spaced rollers, the shafts being located distances below, the upper surface of the hearth less than the lengths of the radii of the rollers, whereby only small portionsgf the rollers will project above the hearth.

5. Ar, annealing furnace having charging and discharging openings, a hearth provided with a plurality of series of openings, shafts provided with spaced disks adapted to project into the openings in the hearth, bearings for said shafts arranged to so support the shafts below the levelof the hearth that small portions of the disks Will project from said openings above the hearth, and so con- A structed that the shafts may be moved laterally therefrom, a side Wall of the furnace heilig prOVidedWith openings arranged to permit the shafts `and disks after being out of the furnace. j v

6. An annealing furnace provided with a shifted laterally to be moved longitudinally partition heating chamber, a shaft provided with a plurality of spaced disks, bearings for so supporting the shaft as to permit of its being moved laterally for removal from the heating chamber, a hearth having its upper surface on a plane a distance ahovethe axis of the shaft less than the radii of the disks so that small portions of the disks will project vabove the hearth, and refractory material extending between adjacent disks and above the shaft.

7. Rollers for receiving and transporting plates in an annealing furnace, rotated by hollow shafts, and having chambers leading to dead ends near the centers thereof, and to interior partition Walls; thence; partly around their interiors near their peripheries to other oppositely disposed dead ends and the opposite faces of corresponding interior Walls and thence outwardly through the. hubs of said rollers, as shown and described.

Au annealing furnace, a plurality of shafts supported transversely of the ,furf' nace, each shaft being provided with a plurality of disks, means for rotating -a plurality of said shafts to advance the sheets through the furnace, means intermediate the adjacent shafts for supporting the sheets as they pass from vthe disks on one shaft to the disks on the next adjacent shaft, the supporting and guiding surfaces of said intermediate supports being so located relativo to the aXes of the shafts that an advancing sheet` or plate Would abut against the'peripheries of the disks at points substantially above the axes of the shafts, aside Wall of the furnace having openings arranged to permit of the longitudinal movement ofthe shafts carrying the' disks from the furnace.

ln testimony whereof I have hereunto set my hand this Q5, day of May, 1920.

, f rHoMAsJ. oosrnLLo. 

